@article{ref1,
title="A fireproof, lightweight, polymer-polymer solid-state electrolyte for safe lithium batteries",
journal="Nano letters",
year="2020",
author="Cui, Yi and Wan, Jiayu and Ye, Yusheng and Liu, Kai and Chou, Lien-Yang and Cui, Yi",
volume="ePub",
number="ePub",
pages="ePub-ePub",
abstract="Safety issues in lithium-ion batteries have raised serious concerns due to their ubiquitous utilization and close contact with the human body. Replacing flammable liquid electrolytes, solid-state electrolytes (SSEs) is thought to address this issue as well as provide unmatched energy densities in Li-based batteries. However, among the most intensively studied SSEs, polymeric solid electrolyte and polymer/ceramic composites are usually flammable, leaving the safety issue unattended. Here, we report the first design of a fireproof, ultralightweight polymer-polymer SSE. The SSE is composed of a porous mechanic enforcer (polyimide, PI), a fire-retardant additive (decabromodiphenyl ethane, DBDPE), and a ionic conductive polymer electrolyte (poly(ethylene oxide)/lithium bis(trifluoromethanesulfonyl)imide). The whole SSE is made from organic materials, with a thin, tunable thickness (10-25 μm), which endorse the energy density comparable to conventional separator/liquid electrolytes. The PI/DBDPE film is thermally stable, nonflammable, and mechanically strong, preventing Li-Li symmetrical cells from short-circuiting after more than 300 h of cycling. LiFePO<sub>4</sub>/Li half cells with our SSE show a high rate performance (131 mAh g<sup>-1</sup> at 1 C) as well as cycling performance (300 cycles at C/2 rate) at 60 °C. Most intriguingly, pouch cells made with our polymer-polymer SSE still functioned well even under flame abuse tests.<p /> <p>Language: en</p>",
language="en",
issn="1530-6984",
doi="10.1021/acs.nanolett.9b04815",
url="http://dx.doi.org/10.1021/acs.nanolett.9b04815"
}